TY JOUR TI THE INFLUENCE OF THE TIMING OF REMOVAL OF TOPS ON THE YIELD AND QUALITY OF POTATO TUBERS IN THE CONDITIONS OF THE FOREST-STEPPE OF THE MIDDLE VOLGA REGION KW potatoes (solanum tuberosum) KW yield KW harvesting KW methods of harvesting potato tops KW storage KW crop losses KW damage to tubers KW crop losses during storage JO Vestnik of Kazan State Agrarian University AU Vladimirov, V.P. AU Sharapova, A.R. AU Mostyakova, A.A. AU Sitnikova, N.V. PY 2022 IS 17 PB Kazan state agrarian University